The Archives has one of the largest collections of primary and secondary resources documenting Long Island. It consists of approximately 36,000 books and volumes of serials, approximately 2,500 cubic feet of manuscripts, 4,500 maps and broadsides, 105,000 photographs, 422 feet of vertical files, and 9,000 reels of microfilm. The Archives has subscriptions to 49 journals and 28 newspapers.